Casio fx-CG10 Advanced Operation Manual page 21

Chapter 1: Polynomial Functions
Sample Solution—Motorcycles and Helmets (continued)
Safety-Belts:
L = 0.119t
S
L = 0.119(10)
S
12,853
L = 0.119(16)
S
15,783
Motorcycle Helmets:
L = 0.0548t
H
L = 0.0548(10)
H
L = 0.0548(16)
H
Using the table, the graph, and the equations, we determined the number of
lives saved by each safety device in 2000 and 2006. To compute the average
increase in number of lives saved per year, between 2000 and 2006, by each
device, we calculated the change in the numbers of lives with respect to the
change in years, as follows:
2
Airbags:
2006
Seatbelts:
Helmets:
2006
g. What are the real-world meanings of these estimated increases?
This means that between 2000 and 2006, on average the number of lives
saved by airbags increased by approximately 178 lives per year, whereas the
number of lives saved by seatbelts and helmets increased by approximately
488 and 126 per year, respectively.
5 4
+ 4.8727t 71.739t
5
+ 4.8727(10)
5
+ 4.8727(16)
4 3
+ 1.9586t 15.87t
4
+ 1.9586(10)
4
+ 1.9586(16)
, 826 1 , 759 1067
2000 6
, ,
15 783 12 853 2
2006 2000
1 , 549 796 753
2000 6
3 2
+ 443.81t 321.73t + 6601.5
4 3
71.739(10) + 443.81(10)
4 3
71.739(16) + 443.81(16)
2
+ 34.646t + 626.26
3 2
15.87(10) + 34.646(10) + 626.26
3 2
15.87(16) + 34.646(16) + 626.26
177 . 8
,
930
488 . 3
6
125 . 5
2
321.73(10) + 6601.5
2
321.73(16) + 6601.5
796
1,549